I second that, I've recently been freelancing on a very large project with many developers and designers.

Zeplin proved to be extremely valuable in ensuring communication between dev and design is kept as high as possible. Devs can easily grab styling for CSS, ask for assets through the messaging feature, view previous versions of a screen/instance. I love the overlay feature too!

I get that this is quite nice, yet super trivial. But what I actually ask myself: how fucking often do you create a project that this is even a thing you notice and take the time to write an article about? :D but yeah, crazy feature haha